gh0strat | 448ac1bbd6429b9ab00d17b6fc3367a28eb9eafb96a1240c4a6682fc72d715fc

General

Target

448ac1bbd6429b9ab00d17b6fc3367a28eb9eafb96a1240c4a6682fc72d715fc.exe
Size

611KB
MD5

8196cf14ee314b1d1336088d3b86008d
SHA1

b1e9ed7ade4acfbe1ea71ae9ac7509911829a5bd
SHA256

448ac1bbd6429b9ab00d17b6fc3367a28eb9eafb96a1240c4a6682fc72d715fc
SHA512

84dfced1f5038a673e06988d933446fc4b67577fbb30d16b0be6f66558d0c8d9433c41d70c321f75072e00f498fd9e8b001e0902085b6baf1059d32c68c99a06
SSDEEP

12288:vFpuzZSkcBNrl5mTEUkDaSdJfpSaoNRVBUyMCe8VMM80B7qrI3iK1XBwZQ:vFmShDrngEUkDaiJfpSaoNRpMCe8CM8T

Score

10^/10

gh0strat purplefox discovery persistence rat rootkit trojan upx

Malware Config

Signatures

Detect PurpleFox Rootkit 5 IoCs

Detect PurpleFox Rootkit.

rootkit

resource	yara_rule
behavioral1/memory/320-1-0x0000000010000000-0x000000001019F000-memory.dmp	purplefox_rootkit
behavioral1/memory/320-19-0x0000000000400000-0x0000000000585000-memory.dmp	purplefox_rootkit
behavioral1/memory/2280-26-0x0000000000400000-0x0000000000585000-memory.dmp	purplefox_rootkit
behavioral1/memory/2280-20-0x0000000001160000-0x00000000012E5000-memory.dmp	purplefox_rootkit
behavioral1/memory/2860-41-0x0000000000400000-0x0000000000585000-memory.dmp	purplefox_rootkit

Gh0st RAT payload 5 IoCs

resource	yara_rule
behavioral1/memory/320-1-0x0000000010000000-0x000000001019F000-memory.dmp	family_gh0strat
behavioral1/memory/320-19-0x0000000000400000-0x0000000000585000-memory.dmp	family_gh0strat
behavioral1/memory/2280-26-0x0000000000400000-0x0000000000585000-memory.dmp	family_gh0strat
behavioral1/memory/2280-20-0x0000000001160000-0x00000000012E5000-memory.dmp	family_gh0strat
behavioral1/memory/2860-41-0x0000000000400000-0x0000000000585000-memory.dmp	family_gh0strat

Gh0strat
Gh0st RAT is a remote access tool (RAT) with its source code public and it has been used by multiple Chinese groups.
rat gh0strat
Gh0strat family
gh0strat
PurpleFox
PurpleFox is an exploit kit used to distribute other malware families and first seen in 2018.
rootkit trojan purplefox
Purplefox family
purplefox

Drops file in Drivers directory 1 IoCs

description	ioc	Process
File created	C:\Windows\system32\drivers\QAssist.sys	Skcsk.exe

Sets service image path in registry 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SYSTEM\ControlSet001\services\QAssist\ImagePath = "system32\\DRIVERS\\QAssist.sys"	Skcsk.exe

Deletes itself 1 IoCs

pid	Process
2916	cmd.exe

Executes dropped EXE 2 IoCs

pid	Process
2280	Skcsk.exe
2860	Skcsk.exe

Loads dropped DLL 1 IoCs

pid	Process
2280	Skcsk.exe

Enumerates connected drives 3 TTPs 22 IoCs

Attempts to read the root path of hard drives other than the default C: drive.

Query Registry

T1012

Peripheral Device Discovery

T1120

System Information Discovery

T1082

description	ioc	Process
File opened (read-only)	\??\O:	Skcsk.exe
File opened (read-only)	\??\U:	Skcsk.exe
File opened (read-only)	\??\W:	Skcsk.exe
File opened (read-only)	\??\R:	Skcsk.exe
File opened (read-only)	\??\T:	Skcsk.exe
File opened (read-only)	\??\Y:	Skcsk.exe
File opened (read-only)	\??\B:	Skcsk.exe
File opened (read-only)	\??\J:	Skcsk.exe
File opened (read-only)	\??\M:	Skcsk.exe
File opened (read-only)	\??\P:	Skcsk.exe
File opened (read-only)	\??\Q:	Skcsk.exe
File opened (read-only)	\??\Z:	Skcsk.exe
File opened (read-only)	\??\G:	Skcsk.exe
File opened (read-only)	\??\H:	Skcsk.exe
File opened (read-only)	\??\K:	Skcsk.exe
File opened (read-only)	\??\N:	Skcsk.exe
File opened (read-only)	\??\S:	Skcsk.exe
File opened (read-only)	\??\E:	Skcsk.exe
File opened (read-only)	\??\I:	Skcsk.exe
File opened (read-only)	\??\L:	Skcsk.exe
File opened (read-only)	\??\V:	Skcsk.exe
File opened (read-only)	\??\X:	Skcsk.exe

Drops file in System32 directory 2 IoCs

description	ioc	Process
File created	C:\Windows\SysWOW64\Skcsk.exe	448ac1bbd6429b9ab00d17b6fc3367a28eb9eafb96a1240c4a6682fc72d715fc.exe
File opened for modification	C:\Windows\SysWOW64\Skcsk.exe	448ac1bbd6429b9ab00d17b6fc3367a28eb9eafb96a1240c4a6682fc72d715fc.exe

UPX packed file 6 IoCs

Detects executables packed with UPX/modified UPX open source packer.

upx

resource	yara_rule
behavioral1/memory/320-0-0x0000000000400000-0x0000000000585000-memory.dmp	upx
behavioral1/files/0x00090000000122ea-9.dat	upx
behavioral1/memory/320-19-0x0000000000400000-0x0000000000585000-memory.dmp	upx
behavioral1/memory/2280-26-0x0000000000400000-0x0000000000585000-memory.dmp	upx
behavioral1/memory/2860-30-0x0000000000400000-0x0000000000585000-memory.dmp	upx
behavioral1/memory/2860-41-0x0000000000400000-0x0000000000585000-memory.dmp	upx

System Location Discovery: System Language Discovery 1 TTPs 5 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	448ac1bbd6429b9ab00d17b6fc3367a28eb9eafb96a1240c4a6682fc72d715fc.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	Skcsk.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	Skcsk.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	PING.EXE

System Network Configuration Discovery: Internet Connection Discovery 1 TTPs 2 IoCs

Adversaries may check for Internet connectivity on compromised systems.

discovery

Internet Connection Discovery

T1016.001

pid	Process
2916	cmd.exe
2748	PING.EXE

Checks processor information in registry 2 TTPs 2 IoCs

Processor information is often read in order to detect sandboxing environments.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key opened	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0	Skcsk.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\~MHz	Skcsk.exe

Modifies data under HKEY_USERS 12 IoCs

description	ioc	Process
Key created	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings	Skcsk.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings	Skcsk.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\ActiveMovie\devenum	Skcsk.exe
Key created	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\ActiveMovie\devenum	Skcsk.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\ActiveMovie\devenum\Version = "7"	Skcsk.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Connections	Skcsk.exe
Set value (data)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Connections\DefaultConnectionSettings = 4600000002000000090000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000	Skcsk.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\ProxyEnable = "0"	Skcsk.exe
Set value (data)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Connections\SavedLegacySettings = 4600000002000000090000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000	Skcsk.exe
Key created	\REGISTRY\USER\.DEFAULT\Software	Skcsk.exe
Key created	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft	Skcsk.exe
Key created	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\ActiveMovie	Skcsk.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
2748	PING.EXE

Suspicious behavior: EnumeratesProcesses 33 IoCs

pid	Process
2860	Skcsk.exe
2860	Skcsk.exe
2860	Skcsk.exe
2860	Skcsk.exe
2860	Skcsk.exe
2860	Skcsk.exe
2860	Skcsk.exe
2860	Skcsk.exe
2860	Skcsk.exe
2860	Skcsk.exe
2860	Skcsk.exe
2860	Skcsk.exe
2860	Skcsk.exe
2860	Skcsk.exe
2860	Skcsk.exe
2860	Skcsk.exe
2860	Skcsk.exe
2860	Skcsk.exe
2860	Skcsk.exe
2860	Skcsk.exe
2860	Skcsk.exe
2860	Skcsk.exe
2860	Skcsk.exe
2860	Skcsk.exe
2860	Skcsk.exe
2860	Skcsk.exe
2860	Skcsk.exe
2860	Skcsk.exe
2860	Skcsk.exe
2860	Skcsk.exe
2860	Skcsk.exe
2860	Skcsk.exe
2860	Skcsk.exe

Suspicious behavior: LoadsDriver 1 IoCs

pid	Process
2860	Skcsk.exe

Suspicious use of AdjustPrivilegeToken 6 IoCs

description	pid	Process
Token: SeIncBasePriorityPrivilege	320	448ac1bbd6429b9ab00d17b6fc3367a28eb9eafb96a1240c4a6682fc72d715fc.exe
Token: SeLoadDriverPrivilege	2860	Skcsk.exe
Token: 33	2860	Skcsk.exe
Token: SeIncBasePriorityPrivilege	2860	Skcsk.exe
Token: 33	2860	Skcsk.exe
Token: SeIncBasePriorityPrivilege	2860	Skcsk.exe

Suspicious use of WriteProcessMemory 12 IoCs

description	pid	Process	procid_target
PID 320 wrote to memory of 2916	320	448ac1bbd6429b9ab00d17b6fc3367a28eb9eafb96a1240c4a6682fc72d715fc.exe	32
PID 320 wrote to memory of 2916	320	448ac1bbd6429b9ab00d17b6fc3367a28eb9eafb96a1240c4a6682fc72d715fc.exe	32
PID 320 wrote to memory of 2916	320	448ac1bbd6429b9ab00d17b6fc3367a28eb9eafb96a1240c4a6682fc72d715fc.exe	32
PID 320 wrote to memory of 2916	320	448ac1bbd6429b9ab00d17b6fc3367a28eb9eafb96a1240c4a6682fc72d715fc.exe	32
PID 2280 wrote to memory of 2860	2280	Skcsk.exe	33
PID 2280 wrote to memory of 2860	2280	Skcsk.exe	33
PID 2280 wrote to memory of 2860	2280	Skcsk.exe	33
PID 2280 wrote to memory of 2860	2280	Skcsk.exe	33
PID 2916 wrote to memory of 2748	2916	cmd.exe	35
PID 2916 wrote to memory of 2748	2916	cmd.exe	35
PID 2916 wrote to memory of 2748	2916	cmd.exe	35
PID 2916 wrote to memory of 2748	2916	cmd.exe	35

C:\Users\Admin\AppData\Local\Temp\448ac1bbd6429b9ab00d17b6fc3367a28eb9eafb96a1240c4a6682fc72d715fc.exe
"C:\Users\Admin\AppData\Local\Temp\448ac1bbd6429b9ab00d17b6fc3367a28eb9eafb96a1240c4a6682fc72d715fc.exe"
1⤵
- Drops file in System32 directory
- System Location Discovery: System Language Discovery
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:320
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c ping -n 2 127.0.0.1 > nul && del C:\Users\Admin\AppData\Local\Temp\448AC1~1.EXE > nul
  2⤵
  - Deletes itself
  - System Location Discovery: System Language Discovery
  - System Network Configuration Discovery: Internet Connection Discovery
  - Suspicious use of WriteProcessMemory
  PID:2916
- - C:\Windows\SysWOW64\PING.EXE
    ping -n 2 127.0.0.1
    3⤵
    - System Location Discovery: System Language Discovery
    - System Network Configuration Discovery: Internet Connection Discovery
    - Runs ping.exe
    PID:2748

C:\Windows\SysWOW64\Skcsk.exe
C:\Windows\SysWOW64\Skcsk.exe -auto
1⤵
- Executes dropped EXE
- Loads dropped DLL
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2280
- C:\Windows\SysWOW64\Skcsk.exe
  C:\Windows\SysWOW64\Skcsk.exe -acsi
  2⤵
  - Drops file in Drivers directory
  - Sets service image path in registry
  - Executes dropped EXE
  - Enumerates connected drives
  - System Location Discovery: System Language Discovery
  - Checks processor information in registry
  - Modifies data under HKEY_USERS
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious behavior: LoadsDriver
  - Suspicious use of AdjustPrivilegeToken
  PID:2860

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Defense Evasion

Modify Registry

1

T1112

Credential Access

Discovery

Peripheral Device Discovery

Query Registry

Remote System Discovery

1

T1018

System Information Discovery

2

T1082

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

System Network Configuration Discovery

1

T1016

Internet Connection Discovery

1

T1016.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Windows\SysWOW64\Skcsk.exe

Filesize
611KB

MD5
8196cf14ee314b1d1336088d3b86008d

SHA1
b1e9ed7ade4acfbe1ea71ae9ac7509911829a5bd

SHA256
448ac1bbd6429b9ab00d17b6fc3367a28eb9eafb96a1240c4a6682fc72d715fc

SHA512
84dfced1f5038a673e06988d933446fc4b67577fbb30d16b0be6f66558d0c8d9433c41d70c321f75072e00f498fd9e8b001e0902085b6baf1059d32c68c99a06

Download Submit
memory/320-0-0x0000000000400000-0x0000000000585000-memory.dmp

Filesize
1.5MB

Download
memory/320-1-0x0000000010000000-0x000000001019F000-memory.dmp

Filesize
1.6MB

Download
memory/320-19-0x0000000000400000-0x0000000000585000-memory.dmp

Filesize
1.5MB

Download
memory/2280-26-0x0000000000400000-0x0000000000585000-memory.dmp

Filesize
1.5MB

Download
memory/2280-20-0x0000000001160000-0x00000000012E5000-memory.dmp

Filesize
1.5MB

Download
memory/2860-30-0x0000000000400000-0x0000000000585000-memory.dmp

Filesize
1.5MB

Download
memory/2860-41-0x0000000000400000-0x0000000000585000-memory.dmp

Filesize
1.5MB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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